Penguins have an interesting, albeit shockingly utilitarian, behavior that keeps helps to keep them safe. Before jumping in the water to go fishing, they jostle each other to the edge of the ice, a gradual and hesitant shuffle. As the (potentially unfortunate) front-line gets to the precipice, the group nudges with the goal of knocking one of their comrades into the water. The first penguin falls into the icy waves, and the group waits. Their involuntary participant surfaces, and swims about, having not been eaten. An indication that there are no hungry killer whales beneath the surface. They all jump in, and the meal can begin.
